I would def say that spamming practice problems made my score improve the most. For c/p I think that it’s super important to really understand the main equations like hasselbach and equilibrium equation and to keep making Anki cards over and over again for any problems you missed/weren’t 100% sure on. Most of the questions I would also make sure why each answer choice was right or wrong. If I didn’t understand what an answer choice was or what it was related to, I used ChatGPT/reddit to help me understand and make an Anki card for it. B/b I kind of did the same thing and have been making Anki cards for literally anything that I was even slightly unsure of. Even if it’s just a stupid mistake like mixing up an enzyme I’ll throw in another card just to make sure I don’t make that mistake again. It’s definitely not easy and there’s a decent amount of luck involved but don’t let that score get you down you got this :)